Question: When did the Rostov-on-Don start as the twinned administrative body as Gera?
Paraphrase: In what year did the Rostov-on-Don begin as the twinned administrative body as Gera?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q908 p:P190 ?s . ?s ps:P190 wd:Q3750 . ?s pq:P580 ?value}